Name: Amanita thiersii
Authority: Bas 1969
Vouchered by: Brad Bomanz
Date found: 6/28/2004
Collected by: Brad Bomanz
Voucher ID:12
Confirming Mycologist: Dr. Andrew Methven
Latitude: 38.273755
Longitude: -90.302096
City: Fenton
County: St. Louis
State: Missouri
Site location: Green Knoll Drive Park
Habitat: lawn
Moisture conditions: very moist
Substrate: grass
Reference document: A Field Guide to Southern Mushrooms - 1985
Author:Nancy Smith Weber, Alexander H. Smith
ISBN No: 0-472-85615-4
Page no:136
Spore length: 8.5 - 11.0 microns
Spore width: 8.5 - 11.0 microns
Spore color: clear
Spore texture: smooth
Spore shape: globose to subglobose
Spore print color: white
Chemical reaction: n/d
This mushroom was found in a large open park grassy area during a season of heavy and frequent rains and 85 - 90 degree temperatures. Classification was made based on spore size, shape and texture, and the general mushroom characteristics. Close examination by Dr. Methven (see annotation above) combined with the 2015 DNA analysis confirmed that this specimen is Amanita thiersii. This specimen was also destructively sampled for DNA by Benjamin E. Wolfe in January 2011 at the Harvard University Farlow Herbarium (FH). (see annotations above). Findings were published in Mycologia 104(1):22-33. 2012. & supplement tables.

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